Not sure if anyone has built and posted something like this before... Had a look and couldn't find anything so I built one.

I route my audio from Traktor into Ableton as an external mixer and layer acid lines a lot... So made this selector so I could key in my acid bass into the open key tuning.

Never built a MIDI rack from scratch before so keen to get feedback!

DL Link: http://www30.zippyshare.com/v/45571579/file.html